Freeze etching - Samenvattingen, Aantekeningen en Examens

PA EFDA Exam Prep [Dentistry Board] 2024/2025 Updated & Verified! 1. Which of the following tasks can an Expanded Functions Dental Assistant (EFDA) perform that a traditional dental assistant may not? Applying sealants - Administering local anesthesia - Diagnosing dental conditions - Performing surgical procedures 2. During a dental procedure, which of the following is the appropriate sterilization method for reusable instruments? Autoclaving - Wiping with alcohol - Using di...

Vulcanization is a physicochemical (physical and chemical) change resulting from the cross linking of the unsaturated hydrocarbon chain of natural rubber (polyisoprene) with sulfur, and the application of heat. Three factors that affect the properties of the vulcanizate (vulcanized product) - answerPercentage of sulphur and accelerator used Temperature of the curing process Time of cure Methods used to cure (vulcanize) rubber are - answerAutoclave (vulcanizer) cure Internal steam cure A...

Describe passivation - Passivation is the formation of a protective oxide Film on the surface reducing its chemical activity and its ability to corrode Describe the following factors and how they affect corrosion - Oxygen: oxygen increases the rate of corrosion temperature Temperature: corrosion usually accelerated with increasing temperature Chemical salts: increase the rate of corrosion by increasing the efficiency of the electrolyte humidity: the wetter the environment, the more corros...

Histology (chapter 1) Questions and Answers 100% pass - acidic surface - toluidine blue - alcian blue - methylene blue. - Hematoxylin - ANS- Basic Dyes -basic surface -Eosin -orange G -acid fuchsin - ANS- Acidic Dyes -light source (xenon arc lamp or mercury-vapor lamp; more advanced: high-power LEDs & lasers) -excitation filter -dichroic mirror (dichroic beamsplitter) -emission filter - ANS- Components of fluorescence microscope -Purple (nucleus) -bright red (cytopla...

Describe air turns - ANSWER-eliminates air stratification. 1-2 Turns is sufficient Below what RH does corrosion virtually cease? - ANSWER-40% 2 ways to reduce RH of boundary layer- - ANSWER-increase surface temp & dehumidification 2 types of dehumidification equipment: - ANSWER-refrigerant & desiccant Benefits of dehumidification - ANSWER-dries air, lowers dew point, holds surface during coating application, holds blast with dry air, permits blasting the entire surface. Electronic...

Describe air turns - ANSWER-eliminates air stratification. 1-2 Turns is sufficient Below what RH does corrosion virtually cease? - ANSWER-40% 2 ways to reduce RH of boundary layer- - ANSWER-increase surface temp & dehumidification 2 types of dehumidification equipment: - ANSWER-refrigerant & desiccant Benefits of dehumidification - ANSWER-dries air, lowers dew point, holds surface during coating application, holds blast with dry air, permits blasting the entire surface. Electronic...

Learning objectives - Why knowledge of signal transduction is important - principles of the resting membrane potential - principles of action potentials - action potentials in aged neurons - mode of action of lidocaine and cocaine - gap junctions: shape and function - the chemical synapse - classic neurotransmitters and neuropeptides - transmitter release mechanism - the neuromuscular synapse - freeze-etching method and transmitter release mechanism - role of clathrine - classific...